LiLo could end up in a psychiatric ward instead after being diagnosed with the mental condition, say close pals.

The Mean Girls star is facing up to 245 days behind bars in the New Year after her probation on two drink-driving convictions was revoked by a judge earlier this month.

Her lawyers intend to claim she needs psychiatric treatment for the disorder, which doctors say is the source of her wild behaviour.

According to experts, NPD affects less than 1% of the population in America.

Sufferers are obsessed with issues of personal inadequacy, power, prestige and vanity.

A source said: “She was beside herself with dread when she first got the diagnosis but now she has begun to view it as her ‘get out of jail free’ card.

“She wants her attorneys to ask the judge if she can be placed in a medical evaluation centre.”

Lohan, 26, will learn her fate at Los Angeles Superior Court on January 15 when she is expected to be formally charged with three new offences stemming from a car crash after which she allegedly lied to police.

Eight days prior to that she is facing an arraignment hearing in New York over her alleged nightclub assault on self-styled psychic Tiffany Mitchell, who has said she may also press civil charges.

Although Lohan has been imprisoned six times since her first arrest in 2007, she has served less than two weeks in total at LA’s Lynwood jail.

The pal added: “Lindsay has been warned that this time there are unlikely to be any acts of leniency by the judge.